Distribution of Coitus in the Menstrual Cycle

@article{Udry1968DistributionOC,
  title={Distribution of Coitus in the Menstrual Cycle},
  author={J. Richard Udry and Naomi M. Morris},
  journal={Nature},
  year={1968},
  volume={220},
  pages={593-596}
}
PERIODICITY is characteristic of the sexual behaviour of lower mammals. In animals with oestrous patterns, the female will accept the male only when she is “in heat”, a condition relating temporally to ovulation and the presence of certain gonadal hormones. Primates are different; apes and most monkeys, like humans, have menstrual cycles, and mate at all times during the cycle. Laboratory studies of several species of primates, however, show a periodicity of sexual behaviour within the… Expand
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